https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: dfd42facf1e4ada021b939b4e19c935dcdd55566 authored by Linus Torvalds on 06 February 2022, 20:20:50 UTC
Linux 5.17-rc3
Linux 5.17-rc3
Tip revision: dfd42fa
mini_lock.cocci
// SPDX-License-Identifier: GPL-2.0-only
/// Find missing unlocks. This semantic match considers the specific case
/// where the unlock is missing from an if branch, and there is a lock
/// before the if and an unlock after the if. False positives are due to
/// cases where the if branch represents a case where the function is
/// supposed to exit with the lock held, or where there is some preceding
/// function call that releases the lock.
///
// Confidence: Moderate
// Copyright: (C) 2010-2012 Nicolas Palix.
// Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6.
// Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6.
// URL: http://coccinelle.lip6.fr/
// Comments:
// Options: --no-includes --include-headers
virtual context
virtual org
virtual report
@prelocked@
position p1,p;
expression E1;
@@
(
mutex_lock@p1
|
mutex_trylock@p1
|
spin_lock@p1
|
spin_trylock@p1
|
read_lock@p1
|
read_trylock@p1
|
write_lock@p1
|
write_trylock@p1
|
read_lock_irq@p1
|
write_lock_irq@p1
|
read_lock_irqsave@p1
|
write_lock_irqsave@p1
|
spin_lock_irq@p1
|
spin_lock_irqsave@p1
) (E1@p,...);
@looped@
position r;
@@
for(...;...;...) { <+... return@r ...; ...+> }
@err exists@
expression E1;
position prelocked.p;
position up != prelocked.p1;
position r!=looped.r;
identifier lock,unlock;
@@
*lock(E1@p,...);
... when != E1
when any
if (...) {
... when != E1
* return@r ...;
}
... when != E1
when any
*unlock@up(E1,...);
@script:python depends on org@
p << prelocked.p1;
lock << err.lock;
unlock << err.unlock;
p2 << err.r;
@@
cocci.print_main(lock,p)
cocci.print_secs(unlock,p2)
@script:python depends on report@
p << prelocked.p1;
lock << err.lock;
unlock << err.unlock;
p2 << err.r;
@@
msg = "preceding lock on line %s" % (p[0].line)
coccilib.report.print_report(p2[0],msg)